added redirection without need of a page, use it for paypal success or failure message already

plugins/cipf_plugin/php/prof_check_page.php

@@ -46,6 +46,8 @@ function handle_prof_is_activ_CIPF($author_id) {
 	*/
 	$redirection_prof_inactiv = home_url() . '/' . $slug_wait_activation;
 
+	// Set up nocache headers before redirecting : https://developer.wordpress.org/reference/functions/wp_safe_redirect/#user-contributed-notes
+	nocache_headers();
 	wp_redirect($redirection_prof_inactiv, 301);
 	exit;
 }